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平台:
DOAJ Directory of Open Access Journals
(Available from 2020.)
Elsevier SD Journals - AutoHoldings
(Available from 2011/01/01 volume: 17 issue: 1 until 2019/07/31 volume: 25 issue: 2.)
Emerald Open Access
(Available from 2020 volume: 26.)
ProQuest SciTech Premium Collection
(Available from 2020/01/01.)